C99.3 on rocks. Fish feeding on grey matter (1930hrs.) When we first arrived and before we got into the water, we observed a dying fish (large adult male) apparently natural death. He was first resting on his side on a rock and we thought he was dead. But after about a minute, he flipped a little but as if trying to erect himself. In doing this, he moved about 1" to the other side of the rock and then lay still for a while more (still on his side). This process was repeated several times until he disappeared several minutes later after we stopped watching for a minute or two. In the process of flipping, he had once almost thrust himself under a rock and it is entirely possible that this is what happened, although we made a rough search for him and could not find him. No planaria or beetles could be observed on or near him. (Flipping motion prevented this?) 0900 hrs. - Water level = 1.78 1000 hrs. - Or = 4 ppm 1300 hrs. - Water level = 1.82 (light hitting NW edge of water area). Seining not successful even when seine left in 1½ hrs. Some of individuals captured were put in the empty (offish) cage.